Hand-operated pressure oilcan



April 1950 c. A. ANDERSON HANDOPERATED PRESSURE OIL-CAN Filed Sept. 27,1946 A5Z0rney:

Patented Apr. 18, 1950 HAND-OPERATED PRESSURE OILCAN Chester A.Anderson, Litchfield, Minn., assignor of one-third to Alfred Andersonand one-third to Raymond N. Ornberg, both of Litchfield, Minn.

Application September 27, 1946, Serial No. 699,907

13 Claims.

This invention relates to hand oilers of that type which includes a pumpwhich is actuated by the fingers to eject oil from the can.

The present invention is an improvement upon the structures disclosedand claimed in my prior Patents Number 2,169,209, issued August 15,1939, and No. 2,299,450, issued October 20, 1942.

It is an object of the present invention to provide a hand Operatedpressure oil can which is conveniently constructed of several partsproviding a cylinder and piston unit, a spout shiftable with the pistonand a finger pressure element supported in association with the spoutwhereby the entire assembly can be inserted in and re moved from the canproper as a unit.

Another object of the invention is to provide an improved piston orplunger unit having associated therewith a piston guiding portion and aspout supporting portion which latter portion includes means foradvantageously securing and supporting the finger pressure element.

Another object of the invention is to provide a pressure oil can whereinthe movable piston assembly and its cooperating parts are effectivelysealed to prevent leakage from the can body and about the lower portionof the spout.

Still another object of the invention is to provide a pressure oil canunit including a spring pressed piston or plunger wherein adequatethrust receiving means is included to limit the spring induced movementof the piston assembly.

The above and other objects and advantages of the invention will morefully appear from the following description made in connection with theaccompanying drawings, wherein like reference characters refer to thesame parts throughout the views, and, in which:

Figure 1 is a view partially in side elevation and partially in verticalsection of an embodiment of the invention;

Figure 2 is a section taken approximately on the line 2-2 of Figure 1with the can body cap removed;

Figure 3 is a fragmentary vertical sectional view through another formof the invention; and

Figure 4 is a fragmentary vertical sectional view through still anotherform of the device.

In Figure 1 there is shown a can body 5 having an externally threadedmouth portion 6, the mouth opening being defined by a rolled edge 1.

Resting upon the rolled edge of the can mouth I is a gasket 8 and on topof the gasket is an annular flange 9 forming the upper portion of acupshaped cylinder I0 having a closed bottom ll. The side wall of thecylinder H] is provided with apertures I! which provide liquid flowcommuni-- cation between the interior of the cylinder l6 and that of thecan body 5.

A piston head I3 is located in the cylinder in said head having an outerflanged portion M and an inwardly concentric parallel flange l5 defininga central opening in said piston IS. A compression spring 16 has itslower end mounted about an upwardly pressed central portion I! of thelower end of the cylinder l0, and the upper end of the spring l6 bearsagainst the horizontal under side portion of the piston |3 between theflanges I l and l5.

Threaded upon the threaded portion of the can mouth area is a centrallyapertured cap l8, said aperture being defined by a downwardly turnedflange IS. The cap I8 is provided with a downwardly facing concaveportion 20 for a purpose to be described below.

A tapered spout 2| extends downwardly, through the aperture in the capl8 and through the central aperture in the piston l3. A circumferentialrib 22 near the bottom of the spout 2| limits downward movement of saidspout through the apertured piston l3 and the extreme lower portion ofsaid spout 2| is bent upon itself as at 23 to grip the inner concentricflange l5 of the piston I3. Consequently, the piston l3 and spout 2| areconnected and held against relative axial movement.

It will be noted that the piston l3 has an outer diameter which issomewhat less than the inner diameter of the cylinder l0. Interposedbetween the outer flange M of the piston 13 and the inner cylinder sidewal1 I0 is a cylindrical portion 24 of a combined piston guiding andspout supporting unit indicated generally at 25; The cylindrical portion24 of the unit 25 closely fits on the piston l3 and has slidingengagement with the inner side wall of the cylinder 6. Above thecylindrical portion 24 is a reduced cylindrical portion 26 which isspaced some distance from the cylinder wall to receive a packing element2'! a portion of which is closely fitted between said reducedcylindrical portion 25 and. the inner side wall of said cylinder [0.Another portion of the packing element 21, as is clearly shown, extendsover a shoulder 28 formed bya further reduction of the diameter of theupper portion of the guiding and supporting unit 25. The upper and thirdcylindrical or tubular reduction 29 of the guiding and supportingelement '25 closely engages a portion of the spout 2 l .as shown.

About the smallest reduced portion 28 of the unit 25 is a tubularelement 29 which extends downwardly between the tubular or cylindricalsection 28 of said member 25 and the downwardly turned flange l9defining the opening in the cap '8. Thence the element 29 is bentoutwardly and its outer edge is curved downwardly as at 30. The bentportion 30 is adapted to abut the portion 20 'of the under surface ofthe cap 3 to provide'athrust receiving member so that the downwardlyturned flange I9 defining the central opening through the cap I8 willnot be subjected to all of the thrust .exerted by the spring 16, and asa result wear of the above mentioned parts is practically limited. :Itwill be noted that the contact area-between'thercurved flange portion 30on the bottom of the outer tubular element 29 is considerably greaterthan the downwardly turned edge of the :flange -l9.

It will also be seen that the upper portion of the packing element 21which lies "about *the shoulder 28 on the guiding and supporting unit isclamped betweenisaidshoulder on said guiding and supporting unit and thecurved flange portion 20 on the tubular element 29. If desired theoutwardly turned lower portion of the tubular element 2-9 may:beprovided'with one '.or more downwardly :dimpled portions 29a shown inFigures'l an'di2'to more firmly grip the pack ing element '21.

Mounted on the upper'portions of the tubular sections28 and 29 is'acollar or flange 3| having 30 a central aperture defined by an upwardlyturned "flange 32. The finger pressure element 3| rests upon the upperend of the outer tubular section 29,1and1the upper portion of the innertubular section 28 is bent over upon the flange 32 as shown at 33 andagainst the upper-side of the finger :pressure element 3| to not onlyengage the flange 32 -but-also to :grip the finger pressure element 3|between said turned-over portion :and the upper end of the outer tubularelement 29.

The device above described is so constructed that when assembled 'itprovides anextremely sturdy, easily operated,.non-leaking pump unit forpressure oil cans. When the cap l8.is unscrewed from the'threadedportion'6 of the can mouth the entire pump unit :and:spout assembly canbe'removed from the can and allofthe parts of the construction exceptthe can proper .are kept together without having any of the parts becomeseparated from others. At the same time, however,'the assembly ofthedevice is relatively simple. The assembly requiresno securing devicessuch as soldering, welding .or bolts, but at the same time it is firmlyheld with its parts :in their proper positions relative to each other."It is rather-clear from the disclosure in the drawing that when thefinger-pressure element is pressed downwardly it will carry the spout2l,.piston I-3 and piston guiding and spout supporting unit '25 as wellasthepacking and the outer tubular element 29 downwardly relative to thecan cap I8 and cylinder l0. .Oil can flow through the openings [.2 tothe bottom .of the cylinder I'll-and when the .loweredgeof the outerflange. Won the ,piston l3 ,pa'ssesbelowsai'cl openings 12 in thecylinder wall on. in ..the llowerjportion .of the cylinder will be.forcibly "ejected through the spout f2l. Naturally, it the level of oilin the .can body .5 is "below the openings IZ the can.must be tilted sothat oil will flow into the cylinder II).

In Figure 3 there .is shown another form of the invention-whichfincludessome of the parts shownanddescribed inconnection with Figure 1.

The can body and its threa'ded mouth por- T0 section 35 which is spacedinwardly from the inner wall of the cylinder l0 similar to the reducedcylindrical'section 26 shown in Figure 1. .A shoulder 36 similar to theshoulder 28 is formed by an inwardly extending portion 31 at "1-5 thetopof the reduced cylindrical section 35 and a downwardly turned flange38 at the inner edge I of the horizontal portion 31 defines a centralopening. A packing element 39 has a portion lying between the reducedcylindrical section 35 and about the shoulder 36 as is clearlyindicated. The cap IS-is provided'with an upwardly oflset portionI8ainto the under side 'of which is fitted a ring ill whichprovides anelement having considerable contact area adapted to engage the underside-of the cap I3 to relieve the pressure and wear upon the flangeIQ-which defines the central opening of said cap 18% described inconnection with Figure 1. The ring 4|] overlies the inwardly turnedportion of the packing element 39 and as in the case of the structureshown in Figure 1 provides withssaid packingelement a yielding thrusttransmitting member adapted to contact the under side of the cap.

Extending upwardly through the central opening in the cap 8-is a tubularelement 4| whose lower end 42 is shown bent about the downwardly turnedflange 38 defining the opening in the upper portion of the compositeelement 34, 35, 31. A short distance above the bent-over lower 4 end 42of the tubular-element 4! said tubular element is :enlarged to provide:a shoulder 43 which clamps 'thering' lll between said shoulder 33 andthe turned-overlower end 62 of the tubular element 4|. The upper portionof the tubular 5 element 4| is reduced in thickness and offset toprovide a shoulder M upon which rests a contrally 'apertured fingerpressure element 45. That portion of the finger pressure element 45defining its central opening isprovided with an up turned flange as overwhich the reduced upper end '41 of the tubular element M is bent,thereby clamping-the finger pressure element 45 between said over-turnedupper end of the tubularelementdl and its shoulder M. At the same timethe upper inner diameter of the reduced end 4'! of the tubular element4! is such as to firmly engage the outer wall of the spout 2! so that itwill be rigidly held in place.

In Figure 4 thereis shown "a third form of construction embodying thegeneralieatures of the invention shown in Figures 1 through 3. The canbody 5-and-cap l8 are the same as in the other constructions, and thecylinder 10, the piston l3 and-spring l'fi arealso the same. The spout'2! extends through the can cap [8 in the same manner as above and it isclamped'to the inner-flange i5 'of the cylinder :0 in the same manner.There is the element with its cylindrical portion 34 lying between theouter piston flange I4 and the inside of the cylinder wall and vtheupward extension of the cylindrical member as is reduced as at 26in theother forms. Lying about a portion of the spout 2! and ex tendingthrough'the opening in the can cap 58.

is a tapered sleeve 48whose lower end is 'bent about an inwardlyconcentric flange 49'lying parallel to the reduced cylindrical portion26. A packing element 50 has a portion lying between the reducedcylindrical portion and the cylinder wall it and another portion thereofoverlying the shoulder 5| at the upper end of the reduced cylindricalportion 25. A somewhat reversely curved packing retaining ring 52overlies the horizontal portion of the packing element 50 and as isshown in Figure 4 the upper portion of the packing retainer ring 52abuts a substantial area of the underside of the can cap !8 in a mannersimilar to the curved flange on the bottom of the outer tube or sleeve29, as viewed in Figure 1. However, in Figure 4 the packing retainerring and thrust absorbing member 52 is an entirely separate piece ofmaterial. It is held down against the packing by the downwardly turnedportion H! of the cap it which defines the central opening in said cap.

The upper end of the tapered tubular element 48 has its upper end turnedover as at 53 to engage an upwardly turned flange 54 on a centrallyapertured finger pressure member 55. A shoulder 56 is formed at thebottom of the upwardly turned flange 54 on the finger pressure member 55and an outer tapered sleeve 5'! extends through the aperture cap is toengage the inner edge of the packing retaining and thrust absorbing ring52, and said sleeve extends upwardly to engage the shoulder 56 on thefinger pressure element 55.

In the structures shown in the drawing it will be seen that I haveprovided an oil can having a reciprocating piston or plunger operated bya firmly fixed finger pressure element mounted on the spout or adjacentthereto and wherein efficient packing means and packing retaining meansis provided, a portion of the packing retaining means being sopositioned relative to the under side of the can cap that upward thrustof the compression spring is is made by a relatively broad surfacecontact by a packing retainer e1ement and the under side of the cap.This greatly reduces wear on the relatively movable parts which areurged together by the spring and increases the effective life of thedevice. The movable piston and bottom of the dispensing spout areassembled in a relatively simple yet permanently firm manner and each ofthe units thereof made up of several parts is held together so that theentire pump and spout unit with the finger pressure element and the cancap can be quickly and easily removed from the can for cleaningpurposes, and all of said parts are interconnected so that they areretained as a unit, and can be just as easily inserted in the can andfastened to the can mouth by means of the cap. As stated above, all ofthe parts are interconnected without having to resort to the use ofWelding, soldering or bolting or other connecting means other than thebending of one metal part upon the other or the clamping of one metalpart between two others. The elements as in Figure 1 and all in Figures3 and 4 which lie between the piston proper and the inner wall of thecylinder provide relatively long wearing guide means for the piston andspout while at the same time a highly efiicient type of packing isprovided to prevent the escape of oil from the can body without imposingtoo much wear on the same. The device is easily operated with one handand by reason of the structure shown and, claimed the parts will workeasily and not become jammed.

It will, of course, be understood that various changes may be made inthe form, details, arrangement and proportions of the various partswithout departing from the scope of my invention.

What I claim is:

1. In a pressure oil can, a can body having a mouth, a pump cylindersupported in said mouth and having its interior in flow communicationwith the interior of said can body, a piston movable in said cylinder, aspout connected to said piston and communicating with the interior ofsaid cylinder, said spout extending upwardly through the mouth of saidcan body, a combined. piston guiding and spout supporting unit, a por--tion of said guiding and supporting unit lying be-- tween said pistonand the inner wall of said cylinder and in sliding contact with saidwall, an other portion of said guiding and supporting unit being spacedinwardly from the inner wall of said cylinder, and a packing elementinterposed between said second mentioned portion of said, guiding andsupporting unit and the inner wall. of said cylinder.

2. The structure in claim 1, and said guiding and supporting unit havingan upwardly disposed.

shoulder, a portion of said packing element being disposed inwardly oversaid shoulder, an apertured cap lying about said spout and removablyreceived on said mouth of said can body, and a thrust transmittingelement interposed between the inwardly disposed portion of saidpackingelement and the under side of said cap.

3. In a pressure oil can,'a can body having a mouth, a pump cylindersupported in said mouth and having its interiorin flow communicationwith the interior of said can body, a piston movable in said cylinder, aspout connected to saidpiston and communicating with the interior ofsaid cylinder, said spout extending upwardly through the mouth of saidcan body, a combined piston guiding and spout supporting unit havinglower and intermediate portions of different diameters, said lowerportion being of greater diameter than said intermediate portion andly-- ing between said piston and the inner wall of said cylinder insliding contact with the latter, and a packing element located betweenthe intermediate portion of said guiding and supporting unit and theinner wall of said cylinder.

4. The structure in claim 3, and an apertured cap through which saidspout extends, said cap being removably secured in said can body andoverthe mouth thereof, and a portion of said packing element beinginterposed between a por-- tion of said guiding and supporting unit andsaid cap.

5. In a pressure oil can, a can body having a mouth, a piston andcylinder assembly supported in said mouth, a spout extending from saidpiston and cylinder assembly and through said mouth, said piston andcylinder assembly including a spring normally urging said piston towardsaid mouth, an apertured cap on said mouth and through which said spoutextends, that portion of said cap defining said aperture having adownwardly turned edge positioned to contact said piston when urgedupwardly by said spring, and the under side of said cap having a secondpiston contact area.

6. The structure in claim 5, and said second piston contact area of saidcap being considerably greater than that of said downwardly turned edgedefining the aperture in said cap.

'7. In a pressure oil can, a can body having a mouth, a cylindersupported in said can body, a piston unit movable in said cylinder, aspring normally urging said piston unit in one direction insaidcylinder, a spout extending outwardly from said piston, said piston unithaving a pair of generally concentric, upwardly disposed tubularelement's thereon, said spout being closely fitted in the inner of saidtubular elements, the outer of said tubular elements being spacedoutwardly'from the intermediate and upper portions of the inner tubularelement, and an apertured finger pressure element, that portion of saidfinger pressure element defining its aperture being secured between theupper portions of said upward tubular elements and said piston unit.

8. The structure in claim 7, and the inner of said upward extensionshaving a greater height than the outer extension, said apertured fingerpressure element fitting closely about said inner tubular extension andlying on the upper edge of said outer tubular extension, and the upperportion of said inner tubular extension being turned over upon the upperside of said finger pressure element to grip saidelement between saidturned over portionof said inner extension and the upper edge of saidouter extension.

9. a pressure oil can, a can body having mouth, a cylinder supported insaid can body, a piston unit movable in said cylinder, a spout connectedto said piston unit and extending outwardly from said cylinder and canmouth, said piston unitincluding an upwardly generally tubular elementhaving an upper portion defining an aperture through which said spoutextends, a second tubular element havingits lower end bent upon theaperture defin'in'g portion of the upper part of said first mentionedtubular piston unit element, "said second tubular element having anupwardly directed shoulder adjacent its upper end, an apertured fingerpressure element lying about the upper portion or said "tubular elementand resting on said shoulder, and a portion of said upper end of said"second tubular element being bent over an said aperture definingportion of said finger pressure element.

10. In a pressure oil can, a can body having a mouth, a cylindersupported in said can body, a piston unit movable in said cylinder, aspout connected to said piston unit and extending outwardly from saidcylinder and can mouth, said piston unit including an upward generallytubular element having an upper end portion defining an aperture throughwhich said spout extends, a second tubular element having its lower endbent upon the aperture-defining portion of the upper part of said firstmentioned tubular piston unit element, said second tubular element beingin contact with "said spout throughout substantially its entire length,a finger pressure element lying about the upper portion of said secondtubular element, and said upper portion of said second tubular elementbeing bent over upon said finger pressure element.

11. 'Il'iestrueture'inclaim 10,and a'third tubular element dying aboutsaid second tubular element, the lower portion of said third tubular 8element resting upon said piston unit, and the upper end of said tliirdtubular element being in contact with the underside of said fingerpressure element.

12. In a pressure oil can, a can body having a mouth, a pump cylindersupported in said mouth and having its interior in flow communicationwith the interior of said can body, a piston movable in said cylinder, aspout connected to said piston and communicating with the interior ofsaid cylinder, said spout extending upwardly through the mouth of saidcan body, a combined piston guiding and shout supporting unit, a portionof said guiding and supporting unit lying between said piston and theinner wall of said cylinder, another portion of said guiding andsupporting unit extending upwardly through the mouth of said can bodyand engaging said spout above said can body, a finger pressure elementmounted on said upwardly extending portion of said guiding andsupporting unit, and said cylinder, piston, spout, piston guiding andsupporting unit and finger pressure element being removable from saidbody as a unit.

13. In a pressure oil can, a can body having a mouth, a pump cylindersupported in said mouth and having its interior in flow communicationwith the interior of said can body, a piston movable in said cylinder, aspout connected to said piston and communicating with the interior ofsaid cylinder, said spout extending upwardly through the mouth of saidcan body,'a combined piston guiding and spout supporting unit, a portionof said guiding and supporting unit lying between said piston and theinner wall of said cylinder, another portion of said guiding andsupporting unit extending upwardly through the mouth of said can bodyand engaging said spout above said can body, an apertured cap removablysecured on said can body mouth, said spout and a portion of said guidingand supporting unit extending through said cap and being verticallymovable relative to said cap, a finger pressure element mounted on saidupwardly extending portion of said guiding and supporting unit, acompression spring interposed between a portion of said cylinder and theunderside of said piston to yieldably urge said piston, spout, andguiding and supporting unit upwardly, and said cap overlying a portionof said guiding and supporting unit to limit the spring urged upwardmovement of said cylinder, spout, and guiding and supporting unit.

CHESTER A. ANDERSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,489,172 Symons Apr. 1, 19241,830,295 Scott 1 Nov. 3, 1931 2,169,209 Anderson .'Aug. 15, 19392,299,450 Anderson Oct. 20, 1942

